Top seed and world number two Caroline Wozniacki crashed out of the Porsche Grand Prix in Stuttgart Thursday.

The Danish teenager, who suffers a recurring ankle injury, lost 6-4, 6-4 to Lucie Safarova of the Czech Republic in just 66 minutes in the second round.

"I didn't feel like I could move 100 percent and if you can't move, you can't run," said the 19-year-old, who withdrew from her semifinal in Charleston with a sprained ankle.

"She was making me run a bit, but now I just want to get ready for my next tournament (in Madrid)."

Safarova will play qualifier Anna Lapushchenkova in Friday's quarterfinals after the Russian defeated sixth seed Victoria Azarenka 6-3, 6-3.